Subsea API Ball Valve 1/2 inch - 24 inch Trunnion Mounted Forged Steel Ball Valve

                                                               Subsea Forged Trunnion Mounted Ball Valve

Subsea ball valves are available in an extensive range of designs, materials, sizes and pressure classes and are in full conformance with
API 6DSS, NACE and ASME VIII specifications. EDVC uses only high-quality forged materials inspected & tested to International Standards
and utilizes advanced manufacturing technology with special emphasis on safety, quality, and long service life of our products. The forging material
can ensure the best rigidity and strength.

The trunnion design employs a ball, with two trunnions, affixed to the ball at the top and bottom.The unit fits into a space in the valve body and cannot move along the flow axis.Trunnion ball valves are suited to high pressure or larger size valves with lower operational torque and long durability.

MAIN FEATURES:

• Trunnion mounted ball valve concept to reduce the operating torque
• Compact two/three pieces design is available on request
• Double block and bleed version is available on request
• Anti-Blow Out stem design
• Standard seat design is single piston effect.
• Double piston effect sealing barrier available on request.
• Antistatic device
• Stem&body special seals to prevent the ingress
• of sea water into the valve body

Fire Safe Construction with Secondary Metal Seat

EDVC’s ball valves have been fire tested and can be supplied to API 6FA and API 607. The soft seat inserts, irrespective of their materials, will possibly fail when subjected to sudden high temperature conditions. EDVC provides a fire-safe design which may substantially prevent leakages through seals when damaged by high temperature. The function of the seats before and after the fire test is shown on the sketches. If the seat inserts are destroyed or burned out, a metal to metal seal is formed between the lower diameter of the seat and ball, while the seat to body seals, the stem packing and the end connections to body seals are designed to resist high temperature and will remain undamaged.

(Figures 1 & 2)

Trunnion Mounting

Trunnion mounted stems absorb the thrust from line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure, operating torque stays low.

(Figure 3)

Body Vent and Drain

The body cavity may be vented in both open and closed state.

(Figure 4)

Double Block and Bleed

The seats are of both-side-sealing type, which means that they seal both on the upstream or downstream side of the ball valve and inside the valve. Whether in the open or closed position, pressure on each side of the ball is blocked from the body cavity by the seat rings engineered to self relieve. No pressure build up can occur in to body cavity. The body cavity can then be vented to the atmosphere or drained through the body port.

(Figure 5)

Sealant Fitting

Sealant lubrication fittings come as a standard with EDVC’s design. In the event of seat insert or stem seal damage, external or internal leakage can occur. Emergency sealant injection can save the integrity of the valve by incorporating a sealant seal around the stem or between the seat and the ball until such time the valve may be properly serviced.

(Figures 6, 7 & 8)

Antistatic Device

The springs provided at the stem allow the static charges to be led to the piping. In this way, an electrostatic charging of the ball is eliminated.

(Figure 9)

3-Piece Trunnion Ball Valves - Full & Reduced Port Expanded View

note: Additional materials available upon request.

*= Used only in bolted body construction.